v2.10.1

Fixed

• Ensured attributes are available when OpenXmlElement is initialized with outer XML (#684, #692)
• Some documentation errors (#681)
• Removed state that made it non-thread safe to validate elements under certain conditions (#686)
• Correctly inserts strongly-typed elements before known elements that are not strongly-typed (#690)

v2.10.0

Added

• Added initial Office 2016 support, including FileFormatVersion.Office2016, ExtendedChartPart and other new schema elements (#586)
• Added .NET Standard 2.0 target (#587)
• Included symbols support for debugging (#650)
• Exposed IXmlNamespaceResolver from XmlPath instead of formatted list of strings to expose namespace/prefix mapping (#536)
• Implemented IComparable<T> and IEquatable<T> on OpenXmlComparableSimpleValue to allow comparisons without boxing (#550)
• Added OpenXmlPackage.RootPart to easily access the root part on any package (#661)

Changes

• Updated to v4.7.0 of System.IO.Packaging which brings in a number of perf fixes (#660)
• Consolidated data for element children/properties to reduce duplication (#540, #547, #548)
• Replaced opaque binary data for element children constraints with declarative model (#603)
• A number of performance fixes to minimize allocations where possible
• 20% size reduction from 5.5mb to 4.3mb
• The validation subsystem went through a drastic redesign. This may cause changes in what errors are reported.

Fixed

• Fixed some documentation inconsistencies (#582)
• Fixed ToFlatOpcDocument, ToFlatOpcString, FromFlatOpcDocument, and FromFlatOpcString to correctly process Alternative Format Import Parts, or "altChunk parts" (#659)

v2.10.0-beta1

New beta release to make the schema and validation changes made so far available on the official nuget package.

Release 2.9.1

Fixed

• Added a workaround for a .NET Native compiler issue that doesn't support calling Marshal.SizeOf with a struct that contains auto-implemented properties (#569)
• Fixed a documentation error (#528)

Release 2.9.0

Added

• ListValue now implements IEnumerable<T> (#385)
• Added a WebExtension.Frozen and obsoleted misspelled Fronzen property (#460)
• Added an OpenXmlPackage.CanSave property that indicates whether a platform supports saving without closing the package (#468)
• Simple types (except EnumValue and ListValue) now implement IComparable<T> and IEquatable<T> (#487)

Changed

• Removed state that was carried in validators that would hold onto packages when not in use (#390)
• EnumSimpleType parsing was improved and uses less allocations and caches for future use (#408)
• Fixed a number of spelling mistakes in documentation (#462)
• When calling OpenXmlPackage.Save on .NET Framework, the package is now flushed to the stream (#468)
• Fixed race condition while performing strict translation of attributes (#480)
• Schema data for validation uses a more compact format leading to a reduction in dll size and performance improvements for loading (#482, #483)
• A number of APIs are marked as obsolete as they have simple workarounds and will be removed in the next major change
• Fixed some constraint values for validation that contained Office 2007, even when it was only supported in later versions
• Updated System.IO.Packaging to 4.5.0 which fixes some issues on Xamarin platforms as well as minimizes dependencies on .NET Framework

2.8.1 Release

Changed

• Corrected package license file reference to show updated MIT License

2.8.0 Release

Added

• Default runtime directive for better .NET Native support.

Changed

• Fixed part saving to be encoded with UTF8 but no byte order mark. This caused some renderers to not be able to open the generated document.
• Fixed exceptions thrown when errors are encountered while opening packages to be consistent across platforms.
• Fixed issue on Mono platforms using System.IO.Packaging NuGet package (Xamarin, etc) when creating a document.
• Fixed manual saving of a package when autosave is false.
• Fixed schema constraint data and standardized serialization across platforms.
• Upgraded to System.IO.Packaging version 4.4.0 which fixes some consistency with .NET Framework in opening packages.

2.7.2 Release

Added

• Package now supports .NET 3.5 and .NET 4.0 in addition to .NET Standard 1.3 and .NET Framework 4.6

Open XML SDK 2.5 Productivity Tool

The Open XML SDK 2.5 Productivity Tool was recently removed from the Microsoft Download Center because of concerns with SHA-1 signatures. There have been many requests for it in the meantime, so we’re now making it available again with a SHA-256 signature for the MSI container (while the files inside the MSI are still signed with SHA-1).

The Productivity Tool requires the SDK 2.5. We're also making it available here to address the needs of developers wanting to use the Productivity Tool to get a quick start on generating Open XML 2.5 source code. It is also using a SHA-256 signature for the MSI container (while the files inside the MSI are still signed with SHA-1).

The MSI files are provided AS IS, to address the needs of developers wanting to use the Productivity Tool to get a quick start on generating Open XML 2.5 source code.

The most recent Open XML SDK itself is now on Github where it’s at version 2.13.1.